Be warned, this post is basically acting as a way of storing these fics because I keep losing the bookmarks; I'm adding them as I find them, or they are recommended to me, for pretty much the same reason:

Voulez-vous: It’s an ordinary day at 221B apart from the fact that Sherlock is speaking in French. What John doesn’t know is that Sherlock has an ulterior motive. What Sherlock doesn’t know is that while John may not speak French, he’s almost fluent in Sherlock. http://archiveofourown.org/works/317010

A Brief Account of Life With Zombies: Sherlock thinks it's all a bit of a nuisance, John is having the time of his life, and Mycroft is Not Impressed. With anything, but mostly his minions' inability to provide a good cup of tea.http://archiveofourown.org/works/282677

Mouth of Babes: Several weeks after the explosion at the pool, Lestrade visits the recuperating Sherlock and John at 221b Baker Street. He brings case-files and food... and a visitor in tow...http://morganstuart.livejournal.com/5636.html

The Bell's Toll: AU fic in which Charles is a sociopath, and is captured, first by mutants, then by humans. But even amid the mutants, things may be more sinister than he thought, especially when it comes to his trainer, Erik Lensherr.http://archiveofourown.org/works/370595

Feline Persuasion: When Charles looks down at his wristwatch and realizes he’s been going on about catnip brands for at least ten minutes, he realizes several other things too: he is officially a crazy cat person now. And he is never going to get laid again.http://archiveofourown.org/works/375475

Shots: Written for a prompt on the 1stclass-kink meme: The kids start a drinking game where they take a shot every time Charles says "groovy" or "my friend. They are always drunk.http://archiveofourown.org/works/216983

The Avengers of Madagascar: Response to this prompt on the capkink meme: Avengers/Penguins of Madagascar Crossover: The Avengers have seen strange things in their line of work. The strangest thing they ever saw was when they came across alternate versions of themselves. This is pure cartoon fluff. Some penguins do get their feathers ruffled but it's all in good fun.http://archiveofourown.org/works/301545

Lord knows, it would be the first time: They might be flawed and have things to work out, but all the Avengers share conviction. And Tony Stark's robots. And Clint's waffles. Plus all the after-Avenging food forays and Darcy's playlist. Everything else will work itself out in the end.http://archiveofourown.org/works/434023?view_full_work=true

I'd buy a big house where we both can live: Missing - Tony Stark, billionaire businessman, heir to Stark industries, reward: none. Only Steve didn't know when he picked the waterlogged unconscious man up from the bank of a river.http://www.archiveofourown.org/works/399351

IronSpotting: The citizens of New York take pride in their icons. They love their avengers, and particularly keep an eye on Tony because LOOK. SO SHINY. He's also rather hard to miss when he's flying.http://www.archiveofourown.org/works/406981

The act of creation will be your salvation: When Tony stark was 17 years old, he built his first AI. On that day, he ceased to be his father's creation, and became a creating force in his own right. That one act likely saved his life, and not in the most obvious ways.http://www.archiveofourown.org/works/401961

Follow forever: 'We can reblog each other's stuff to boost the notes count, start a shipping war, troll Cap's tag...' he trailed off when he received only a blank stare in response. 'Kitten gifs,' he tried tentatively, pouting a bit.http://www.archiveofourown.org/works/400221

Four (or five) reasons for kidnapping Tony stark: There are four reasons for kidnapping Tony Stark. Tony's sick of all of them. Well, there's potentially a fifth, but it's highly unlikely that Captain America will suddenly fulfill THAT fantasy. Tony's deeply disappointed about that.Steve Rogers, as always, is oblivious. At least, that is, until someone who isn't him kidnaps Tony. Then he's just pissed.http://archiveofourown.org/works/391599

Some things shouldn't be a chore: Steve takes things like personal responsibility and respect seriously. Tony's got people he pays to take care of that kind of thing, and anyway, he's pretty sure that he's going to die of some exotic disease in his workshop, because Dummy's still a little spotty about what is 'clean' enough to put on an open wound. The rest of the Avengers are in this for personal gain, except for Clint, he just enjoys being a dick. And some things shouldn't be a chore.http://archiveofourown.org/works/381185

As events dictate: In the aftermath of a fire at the Patrician’s Palace, Vetinari is feared dead, but all is not quite as it seems (god I suck at summaries!), and Drumknott gets a most unusual job offer.http://archiveofourown.org/works/437685

Mister Vimes'd go spare!: In the wake of the death of his Grace Sir Samuel Vimes, the various city watches across the Disc are brought together in a way seldom observed among coppers.http://archiveofourown.org/works/244534

Wheel 'n' deal: I was having a really bad day. The type that starts with a baseball bat to the head, and ends with a really smug demon helping you out of a summoning circle.http://archiveofourown.org/works/382240

Deliver us from evil: part 1: Mortality: Late 1890: A young gentleman hires Sherlock Holmes to investigate his step-uncle, Culverton Smith. As Holmes digs deeper, he finds links to a powerful old enemy—and must come face to face with his own mortality. The first part in a series.http://m.fanfiction.net/s/7242298/1/

This kid I once knew: Daniel sends Suzie's whole improv group an e-mail saying "check this out, it's cool!!!" and a link to a web comic called The Adventures of Spaceman Spiff.http://archiveofourown.org/works/142388

Every day is a reminder: There is a certain fear some children share as they grow up, that whatever they do will never be as good as what's come before. Among all the other things he will ever be, Calvin has never been one of those kids.http://archiveofourown.org/works/36485

Echoes in a lonely world: Dr. Horrible carries his device (it doesn’t have a name yet, but he’s been mentally referring to it as "That Empathy Thing") with him on heists for a week and a half before Captain Hammer finally shows up. Not nearly as serious as the title suggests.http://archiveofourown.org/works/138889

Startrek 2009

Teenage troubles: Jo loved her fathers, she really did, but dammit, she liked this guy. Meeting the parents sucks, but when your fathers are Enterprise legends Dr Leonard McCoy and his husband Captain James T. Kirk, it just adds an extra layer of pressure/http://www.fanfiction.net/s/7989253/1/Teenage_troubles

House [M.D]

Air Conditioner: After Head and Heart, House is physically damaged. A previously existing co-worker-with-benefits relationship with Foreman is the only connection he has to rely on afterwards.http://www.archiveofourown.org/works/127536

The Contract: He laughed silently and hysterically: He was a human piano of pain. House the human piano of pain. It had a nice ring to it. Very dark: Strong House/Wilson friendship. Cuddy and Steve McQueen. Complete with DVD extras and missing scenes.http://fanfiction.net/s/2798672/1/The_Contract

Clash of the titans: Doctor who/house/the mentalist/sherlock crossover. It also helps if you know some monty python. Stick them all in the same room and see what happens!http://www.fanfiction.net/s/7712075/1

They're watching, so beware: “I really think you have the wrong Time Lord here,” the Doctor tried to explain. “If you’re looking for a would-be-evil-mastermind, then I can introduce you to the Master. Well, I could have, except he’s dead. Well... probably. Never can tell with him.”http://archiveofourown.org/works/373287

Saving expertise: Captain Hammer's day-saving is interrupted by a smartass with a flying suit of armor - which naturally means the third party is a villain, right?http://archiveofourown.org/works/3040

You must come in at the door: "Who the hell drank all my booze?" Tony shouts at the universe, at Thor, at JARVIS, at Pepper, at his teammates who seem to think he really meant it when he said "Mi casa es su casa" and wasn't just being nice, and, for good measure, at Thor again.http://archiveofourown.org/works/433132

Waiting for vengeance: When Dr. Doom's technology and Loki's magic react badly to each other, the Avengers are sent into the future, leaving Jarvis to watch the world crumble and Panem to rise as he waits for their return.http://archiveofourown.org/works/363169

Two brain cavities are better than one: Skulduggery Pleasant/BBC!Sherlock crossover. Skulduggery’s skull resided in Baker Street 221B for while before it was stolen and eventually made its way along to Valkyrie and Tanith, to be returned to the Skeleton Detective himself.http://archiveofourown.org/works/305163

Sherlock Squared: A RDJ!Sherlock Holmes/BBC!Sherlock/Doctor Who crossover. When both Holmeses(?) switch places, both watsons discover how different they are, but also how similar they can be.http://m.fanfiction.net/s/7892367/1/

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Comments

Thanks for recommendations!By the way, have you read "No Matter" - Doctor Who and Sherlock Holmes crossover by Sarah the nerd? It's brilliant, really brilliant, though it reminds more of a movie scenario rather than a proper fic, it is still a fantastic piece of work.

Wonderful list, thank-you. I found this you may like it, Harry Potter and Discworld cross-over. It was amazing and so well written( It wasn't angst but I can't read it without shedding a tear. http://www.fanfiction.net/s/3673824/1/End-Of-the-Line by she who guards.